xref: /openbmc/linux/drivers/gpu/drm/i915/i915_params.c (revision fb960bd2)
1 /*
2  * Copyright © 2014 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the
6  * "Software"), to deal in the Software without restriction, including
7  * without limitation the rights to use, copy, modify, merge, publish,
8  * distribute, sub license, and/or sell copies of the Software, and to
9  * permit persons to whom the Software is furnished to do so, subject to
10  * the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the
13  * next paragraph) shall be included in all copies or substantial portions
14  * of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
25 #include "i915_params.h"
26 #include "i915_drv.h"
27 
28 #define i915_param_named(name, T, perm, desc) \
29 	module_param_named(name, i915_modparams.name, T, perm); \
30 	MODULE_PARM_DESC(name, desc)
31 #define i915_param_named_unsafe(name, T, perm, desc) \
32 	module_param_named_unsafe(name, i915_modparams.name, T, perm); \
33 	MODULE_PARM_DESC(name, desc)
34 
35 struct i915_params i915_modparams __read_mostly = {
36 #define MEMBER(T, member, value) .member = (value),
37 	I915_PARAMS_FOR_EACH(MEMBER)
38 #undef MEMBER
39 };
40 
41 i915_param_named(modeset, int, 0400,
42 	"Use kernel modesetting [KMS] (0=disable, "
43 	"1=on, -1=force vga console preference [default])");
44 
45 i915_param_named_unsafe(panel_ignore_lid, int, 0600,
46 	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
47 	"-1=force lid closed, -2=force lid open)");
48 
49 i915_param_named_unsafe(semaphores, int, 0400,
50 	"Use semaphores for inter-ring sync "
51 	"(default: -1 (use per-chip defaults))");
52 
53 i915_param_named_unsafe(enable_rc6, int, 0400,
54 	"Enable power-saving render C-state 6. "
55 	"Different stages can be selected via bitmask values "
56 	"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
57 	"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
58 	"default: -1 (use per-chip default)");
59 
60 i915_param_named_unsafe(enable_dc, int, 0400,
61 	"Enable power-saving display C-states. "
62 	"(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
63 
64 i915_param_named_unsafe(enable_fbc, int, 0600,
65 	"Enable frame buffer compression for power savings "
66 	"(default: -1 (use per-chip default))");
67 
68 i915_param_named_unsafe(lvds_channel_mode, int, 0400,
69 	 "Specify LVDS channel mode "
70 	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
71 
72 i915_param_named_unsafe(panel_use_ssc, int, 0600,
73 	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
74 	"(default: auto from VBT)");
75 
76 i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
77 	"Override/Ignore selection of SDVO panel mode in the VBT "
78 	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
79 
80 i915_param_named_unsafe(reset, int, 0600,
81 	"Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
82 
83 i915_param_named_unsafe(vbt_firmware, charp, 0400,
84 	"Load VBT from specified file under /lib/firmware");
85 
86 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
87 i915_param_named(error_capture, bool, 0600,
88 	"Record the GPU state following a hang. "
89 	"This information in /sys/class/drm/card<N>/error is vital for "
90 	"triaging and debugging hangs.");
91 #endif
92 
93 i915_param_named_unsafe(enable_hangcheck, bool, 0644,
94 	"Periodically check GPU activity for detecting hangs. "
95 	"WARNING: Disabling this can cause system wide hangs. "
96 	"(default: true)");
97 
98 i915_param_named_unsafe(enable_ppgtt, int, 0400,
99 	"Override PPGTT usage. "
100 	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
101 
102 i915_param_named_unsafe(enable_execlists, int, 0400,
103 	"Override execlists usage. "
104 	"(-1=auto [default], 0=disabled, 1=enabled)");
105 
106 i915_param_named_unsafe(enable_psr, int, 0600,
107 	"Enable PSR "
108 	"(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
109 	"Default: -1 (use per-chip default)");
110 
111 i915_param_named_unsafe(alpha_support, bool, 0400,
112 	"Enable alpha quality driver support for latest hardware. "
113 	"See also CONFIG_DRM_I915_ALPHA_SUPPORT.");
114 
115 i915_param_named_unsafe(disable_power_well, int, 0400,
116 	"Disable display power wells when possible "
117 	"(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
118 
119 i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)");
120 
121 i915_param_named(fastboot, bool, 0600,
122 	"Try to skip unnecessary mode sets at boot time (default: false)");
123 
124 i915_param_named_unsafe(prefault_disable, bool, 0600,
125 	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
126 	"For developers only.");
127 
128 i915_param_named_unsafe(load_detect_test, bool, 0600,
129 	"Force-enable the VGA load detect code for testing (default:false). "
130 	"For developers only.");
131 
132 i915_param_named_unsafe(force_reset_modeset_test, bool, 0600,
133 	"Force a modeset during gpu reset for testing (default:false). "
134 	"For developers only.");
135 
136 i915_param_named_unsafe(invert_brightness, int, 0600,
137 	"Invert backlight brightness "
138 	"(-1 force normal, 0 machine defaults, 1 force inversion), please "
139 	"report PCI device ID, subsystem vendor and subsystem device ID "
140 	"to dri-devel@lists.freedesktop.org, if your machine needs it. "
141 	"It will then be included in an upcoming module version.");
142 
143 i915_param_named(disable_display, bool, 0400,
144 	"Disable display (default: false)");
145 
146 i915_param_named_unsafe(enable_cmd_parser, bool, 0400,
147 	"Enable command parsing (true=enabled [default], false=disabled)");
148 
149 i915_param_named(mmio_debug, int, 0600,
150 	"Enable the MMIO debug code for the first N failures (default: off). "
151 	"This may negatively affect performance.");
152 
153 i915_param_named(verbose_state_checks, bool, 0600,
154 	"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
155 
156 i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
157 	"Force enable atomic functionality on platforms that don't have full support yet.");
158 
159 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
160 i915_param_named_unsafe(edp_vswing, int, 0400,
161 	"Ignore/Override vswing pre-emph table selection from VBT "
162 	"(0=use value from vbt [default], 1=low power swing(200mV),"
163 	"2=default swing(400mV))");
164 
165 i915_param_named_unsafe(enable_guc_loading, int, 0400,
166 	"Enable GuC firmware loading "
167 	"(-1=auto, 0=never [default], 1=if available, 2=required)");
168 
169 i915_param_named_unsafe(enable_guc_submission, int, 0400,
170 	"Enable GuC submission "
171 	"(-1=auto, 0=never [default], 1=if available, 2=required)");
172 
173 i915_param_named(guc_log_level, int, 0400,
174 	"GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
175 
176 i915_param_named_unsafe(guc_firmware_path, charp, 0400,
177 	"GuC firmware path to use instead of the default one");
178 
179 i915_param_named_unsafe(huc_firmware_path, charp, 0400,
180 	"HuC firmware path to use instead of the default one");
181 
182 i915_param_named_unsafe(enable_dp_mst, bool, 0600,
183 	"Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
184 
185 i915_param_named_unsafe(inject_load_failure, uint, 0400,
186 	"Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
187 
188 i915_param_named(enable_dpcd_backlight, bool, 0600,
189 	"Enable support for DPCD backlight control (default:false)");
190 
191 i915_param_named(enable_gvt, bool, 0400,
192 	"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
193